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(No Model.) 4'S'heet sSheet 1.

J FINDER. LETTING-OFF MOTION FOR LOOMS.

No. 374,083. Patented Nov. 29, 1887.

wyizi or Jmeare Nv PETERS, Puma-Lithographer, Washington, D. C.

(No Model.) 4 Sheets-Sheet 2. J. FINDER. LETTING-OFF MOTION FOR LOOMS.

Patented Nov r we a Z 1% N. PETERS. Phnlo-ljilmgrzlphor. Washingtnn. D a

(No Model.) 4 Sheets-Sheet J. FINDER.

LETTING-OFF MOTION FOR LOOMS.

No. 374,083.. Patented Nov; 29., 1887.

(No Model.) 4 Sheets-Sheet 4.

J. FINDER.

LETTING-OFF MOTION FOR LOOMS. N0. 374,083. Patented N 0v. 29, 1887.

Wineaaeg V I 1%7/672202' lww d N PETERS Pholb-Lilhogrlphar. Washingtom u:c.

UNITED STATES PATENT Orricn.

JAMES PINDER, OF CLEOKHEATON, COUNTY OF YORK, ENGLAND.

"- LETTING-OFF MOTION FOR Looms.

SPECIFICATION forming part of Letters Patent No. 374,083, dated November 29, 1887.

Application filed March 22, 1886. Serial No. 196,151. (No model.) Patented in England May 14, 1885, No. 5,936, and'in France February 15, 1886, manure.

To all whom it may concern:

Be it known that I, JAMES FINDER, a subject of the Queen of Great Britain and Ireland, and residing at Cleckheaton, in the county of York, England, have invented certain Improvements in Letting-Off Motion in Looms for Weaving, (for which I have obtained patents in Great Britain, dated May 14, 1885, No. 5,936, and in France, dated February 15, 1886,

No. 174,175,) of which the following is a specification.

My invention relates to certain improvements in apparatus for supplying or letting off thewarp from the warp-beam when weaving, and has for its object the regulation of the amount of warp to be delivered at each successive pick for any number of picks in a given distance, and the movement of the warp beam in such a manner that it is allowed to gradually increase its speed as the diameter of the warp-roll on the beam decreases, thus to cause the warp. to be run or let off the beam at auniform speed from a full warp-beam until it is empty.

In the accompanying drawings, Figure 1 represents an end elevation of such portions of a loom as are necessary to explain my invention, parts being broken away. Fig. 2 is a View of my apparatus, looking from the back of the loom; Fig. 3, a section through line a b of Fig. 2; Fig. 1, a side view of a modified form of sufficient of the devices to show the mannerin which the motion may be obtained by a reciprocating bar. Fig. 5 represents a rear view of the modification shown in Fig. 4, and Figs. 6, 7, and 8 are details. Figs. 9 and 10 are views showing the manner of rotating the warp-beam.

The loom end or frame is indicated by the letter A, on which-is mounted,in the ordinary manner, the crank or driving-shaft B, upon which is secured atappet, O, that actuates the oscillating arm 0, having a long slot-hole therein, in which is fitted a movable stud for supporting the bar D, which is also connected to the sliding block D, carried by the surrounding frame. On the opposite side of the sliding block D is mounted a rod, E, connect ing the's'ame to the frame F, made to slide freely on the bars E, that are attached to the horizontal arm of the lever E, which is mounted on the boss of the flange-pulley J, said pulley being mounted loosely on a short shaft or spindle, S, attached to one end of the warpbeam. On the arms of frame F is mounted the pulley or roller G, which rests and rolls upon the warp from the commencement with a full beam until it is all let off. The frame F and pulley or roller G are continually reciprocating, moving through about the same space, and when the beam is full of warp the frame F is near to the top of the bars E, at

its greatest distance from the center of the warp-beam. It will be easily perceived that as the roll of warp W on the beam reduces in diameter the frame F will gradually lower, or move nearer to the center of the beam, there- 'by moving the dogs H, hereinafter described, attached to the bottom portion of the lever E farther than when the frame is at the top, the extra distance being in proportion to the lowering of the frame F on the rods E, which is regulated by the decrease in the diameter of the roll of warp on the beam.

moving the frame F and lever E in one direction the dogs H grip the pulley-flange J, thereby moving the same and the warp-beam, said beam being driven from the said pulley through the devices hereinafter described, and thus letting off a quantity of warp each time the frame F and lever E are moved, the springs S, on the return-stroke of the lever E, pulling the dogs back to their original position, ready for the next pick.

The warp is conducted over the bar L, mounted on the arms L, supported by brackets attached to the loom ends. Each arm is extended by levers M, to each of which is attached a spring, S, by which the warp is kept at the same tension, the springs allowing the arms and bar L to oscillate at the time the shedding or opening and closing of the'warpthreads take place.

In order that the warp-beam maybe moved so as to let off the warp in direct relation to the take-up of the ordinary front piece beams, I attach to one of the arms L a bar, N,and connect the same by a cord or chain, 0, (passing over grooved pulleys) to the bar P, which is free to slide in bracket P. The bar P is enlarged and a groove cut therein for the reception of the angular cross-piece at the end of the bar P said angular piece P being formed with a vertically-beveled edge that engages the groove in the bar P. If in case the stud in the slot-hole in oscillating arm 0 be so fixed that less warp is being let off than the front beams are taking up, then the bar L on arms L will move toward the loom in the direction of the arrow, thereby compensating for the additional warp taken up by the ordinary front beams over that delivered by the warp-beam. By the bar L and arms moving in the direction as described the bar P is lowered, thereby allowing the top end of the arm 0 to come nearer to the center of the crankshaft B, so that the tappet C actuates or moves the said arm through more space, thus moving the frame F more and thereby letting off more warp; but in case too much warp is be ing let off the springs S cause the said arms and bar L to move in the opposite direction, and then the bar I is raised and'forees the end of the bar I toward the arm 0, thereby preventing it coming so much into contact with the tappet 0, thus reducing the stroke of the oscillating arm G, and therefore that of the frame F and the distance the warp-beam is turned.

In order to lock the bar L or keep it rigid during the beat-up of the weft, I secure atappet, Q, on the crank-shaft B, (see detail, Fig. 7 which operates the lever It, mounted on a short shaft and supported by a suitable bracket. To the said lover or shaft is secured an enlarged piece, T, (see Fig. 8,) in which is cut a groove that slides on the web U, raised on the lever M. \Vhen the full part of the H tappet Q is in contact with the lever B, the

grooved end T binds on the web U,thus locking the same and firmly retaining in position the bar L, on which the warp IV is supported.

I can obtain the necessary motion of the warp-beam by dispensing with the oscillating arm G and substituting therefor a reciprocating bar, G", which is operated by the expansion or regulation tappet O, the bar 0 having an arm extending therefrom,iu which is formed slot-hole C". nection with the driving-shaft, as shown in Fig. 5, whereby it can be adjusted toward and from the arm of the reciprocating bar 0 as required. A spring, S acting in opposition to this tappet, is attached to the bar G and connects with the frame, as shown in Fig. 5.

The frame F is mounted on the bars E of the lever E as before described, and is connected to the bar 0 by a projecting pin, F secured to and extending from the said frame through a slot-hole formed in the lever E and slot-hole C in the reciprocating bar, thus con- The tappet O has a slotted connecting them together in a direct manner. By this arrangement as the roll of warp on the beam decreases in diameter the projecting pin F lowers in the slot-holes of lever 13' and bar C, thereby causing the dogs H to turn the warp-beam gradually more, and thus let off more warp, in the same manner as when the frame F is connected to the oscillating arms 0 by the rods, in the manner as before described.

Figs. 9 and 10 show the devices for rotating the warp-beam from the flanged pulley J, which is actuated as hercinbefore described, and is free to revolve on the spindle or shaft Si To the back of the pulley J is secured a bevel-wheel, V, which is also free on the shaft S, and gearing with this wheel \V is a bevelwheel, V secured on a short shaft carrying a spur-wheel, Y, the latter gearing with a pinion, Y, secured on a worm-shaft, Y, which drives a worm-wheel, Y keyed on the shaft S, and so turns the same, together with the attached warp-beam. By placing a wrench or hand-lever, Z, on the square X at the end of the worm-shaft Y and turning the same the attendant can rotate the warp-beam by hand, as desired;

In Figs. 4 and 5 a somewhat different arrangement of gearing is shown, the spur-wheel Y and its pinion Y being placed immediately back of the pulley J and parallel therewith, instead of at right angles thereto, as shown in the other figures, and the gears \V being in more immediate connection with the wormshaft; but the rotation of the warpbeam is effected substantially in the manner already described. \Vhen the flanged pulley J is actuated by the dogs H, as hereiubefore described, the motion thus imparted to said pulley is transmitted, through the gears XVWV and Y, Figs. 9 and 10, to the pinion Y, and thence, through the worm Yflwheel Y", and spindle S, to the warp-beam, thereby letting off a quantit-y of warp each time the pulley J is moved through-the frame F, lever E and its dogs. Asimilar effect is produced through the mechanism illustrated in Figs. 4 and 5, the move ment of the pulley J in this case being first transmitted through the gearsYY, and thence through the gears W W to the worm-gear Y Y, spindle S", and connected warp-beam, and in either case the warp-beam is free to be operated by hand through a wrench or lever, Z, applied to the shaft of the worm Y What I claim is- 1. The combination of the frame A, the driving-shaft B, a tappet on said shaft, a bar or arm engaging said tappet, the frame F, means for connecting said bar and frame F, the roller G,supported by arms on said frame, the lever E having dogs H and springs S, the pulley J, the warp-beam, the spindle S, attached to the warp-beam, and gearing connecting said spindle and pulley, substantially as described.

2. The combination of the shaft 13, having tappet Q, the lever B, having enlarged piece T, the lever M, provided with web V, the

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spring S, arm L, and bar L, substantially as the spindle S", gearing connecting said spin described. dle andv pulley, the lever E having dogs H 3. The combination of the bar L, arm L, and springs S, the frame F, having pin F, and r5 lever M, having spring S, the grooved bar P, the roller G, supported by said frame, sub- 5 the chain 0, the bar P having an angular stantially as described.

crosspiece, P formed with a vertically-bev- In testimony whereof Ihave signed my name eled edge working in the grooved bar P, the to this specification in the presence of two sublever G, and the tappet G, substantially as scribing witnesses.

described. JAMES FINDER. IO 4;. The combination of the driving-shaft B, Witnesses:

the expansion-tappet 0*, the reciprocating bar ARTHUR J os. TAYLOR, O ythe spring 8*, the warp-beam, the pulley J, l WILLIAM RUST. 

